:root{
  --bs-bg:#08101f;
  --bs-panel:rgba(17,27,51,.76);
  --bs-line:rgba(151,170,211,.16);
  --bs-line-strong:rgba(151,170,211,.28);
  --bs-text:#eef4ff;
  --bs-muted:#9faccc;
  --bs-blue:#7aa7ff;
  --bs-violet:#9b8cff;
  --bs-call:#36d98b;
  --bs-put:#ff6475;
}
*{box-sizing:border-box}
body.black-scholes-page{
  background:radial-gradient(circle at 70% 7%,rgba(87,104,255,.12),transparent 28%),#080e1b;
  color:var(--bs-text)
}
.bs-hero{padding:132px 0 34px}
.bs-breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;color:var(--bs-muted);font-size:.9rem;margin-bottom:26px}
.bs-breadcrumb a{color:inherit;text-decoration:none}
.bs-breadcrumb a:hover{color:#fff}
.bs-hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.65fr);gap:26px;align-items:stretch}
.bs-kicker,.bs-section-label{display:inline-flex;color:#afbeff;font-weight:800;font-size:.85rem;letter-spacing:.02em;margin-bottom:10px}
.bs-hero h1{font-size:clamp(2.2rem,5vw,4.1rem);line-height:1.12;margin:0 0 16px}
.bs-lead{max-width:850px;color:#b9c5df;font-size:1.08rem;line-height:2;margin:0}
.bs-summary-card,.bs-panel,.bs-warning,.bs-related>a{
  background:linear-gradient(145deg,rgba(22,33,61,.84),rgba(10,18,36,.84));
  border:1px solid var(--bs-line);
  box-shadow:0 18px 50px rgba(0,0,0,.18);
  backdrop-filter:blur(16px)
}
.bs-summary-card{border-radius:22px;padding:20px}
.bs-summary-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px}
.bs-summary-badge{display:inline-flex;padding:7px 11px;border-radius:999px;color:var(--bs-blue);background:rgba(122,167,255,.1);font-size:.82rem;font-weight:900}
.bs-summary-label{color:var(--bs-muted);font-family:Inter,Vazirmatn,sans-serif;font-size:.78rem}
.bs-summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.bs-summary-grid>div{padding:13px;border:1px solid var(--bs-line);border-radius:15px;background:rgba(7,13,28,.4)}
.bs-summary-grid small{display:block;color:var(--bs-muted);margin-bottom:6px;font-size:.76rem}
.bs-summary-grid strong{font-size:.95rem}
.bs-shell{padding:16px 0 70px}
.bs-workspace{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
.bs-panel{border-radius:22px;padding:22px}
.bs-panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:18px}
.bs-panel-head h2{font-size:1.35rem;margin:0}
.bs-panel-note{color:var(--bs-muted);font-size:.78rem;max-width:240px;line-height:1.8}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.calc-grid label{display:grid;gap:7px}
.calc-grid label>span{color:#aab6cf;font-size:.8rem}
.calc-grid input{
  width:100%;
  background:#080f1d;
  border:1px solid rgba(139,155,210,.23);
  color:#eef3ff;
  border-radius:12px;
  padding:12px 13px;
  font:inherit;
  direction:ltr;
  text-align:left;
  outline:none;
}
.calc-grid input:focus{border-color:rgba(122,167,255,.62);box-shadow:0 0 0 3px rgba(122,167,255,.08)}
.bs-calc-btn{width:100%;background:linear-gradient(135deg,rgba(99,121,255,.35),rgba(130,79,255,.25));border-color:rgba(122,167,255,.35);color:#fff}
.bs-prices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.bs-price-card{border:1px solid var(--bs-line);border-radius:17px;padding:17px;background:rgba(7,13,28,.45)}
.bs-price-card small{display:block;color:var(--bs-muted);margin-bottom:8px}
.bs-price-card strong{font-size:1.65rem;font-family:Inter,Vazirmatn,sans-serif}
.bs-price-card.call{box-shadow:inset 0 0 0 1px rgba(54,217,139,.05)}
.bs-price-card.put{box-shadow:inset 0 0 0 1px rgba(255,100,117,.05)}
.bs-price-card.call strong{color:var(--bs-call)}
.bs-price-card.put strong{color:var(--bs-put)}
.bs-greeks-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.bs-greeks-grid>div{border:1px solid var(--bs-line);border-radius:15px;padding:14px;background:rgba(7,13,28,.38)}
.bs-greeks-grid small{display:block;color:var(--bs-muted);font-size:.78rem;margin-bottom:7px}
.bs-greeks-grid strong{font-family:Inter,Vazirmatn,sans-serif;font-size:.96rem}
.bs-warning{margin-top:16px;border-radius:17px;padding:16px 18px;display:flex;gap:12px;align-items:flex-start}
.bs-warning strong{color:#fff;white-space:nowrap}
.bs-warning span{color:#aeb9ce;line-height:1.9}
.bs-related{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}
.bs-related>a{text-decoration:none;color:var(--bs-text);border-radius:18px;padding:16px;transition:.2s transform,.2s border-color}
.bs-related>a:hover{transform:translateY(-2px);border-color:rgba(122,167,255,.42)}
.bs-related strong{display:block;margin-bottom:6px}
.bs-related span{color:var(--bs-muted);font-size:.82rem}
@media(max-width:980px){
  .bs-hero-grid,.bs-workspace{grid-template-columns:1fr}
  .bs-related{grid-template-columns:1fr 1fr}
}
@media(max-width:650px){
  .bs-hero{padding-top:108px}
  .calc-grid,.bs-prices,.bs-greeks-grid,.bs-related{grid-template-columns:1fr}
  .bs-panel-head,.bs-warning{flex-direction:column}
  .bs-summary-grid{grid-template-columns:1fr 1fr}
}